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Anything you'd recommend around a 20x1.9 that's a bit nobbly? Using the bike for work and will occasionally be travelling along Bournemouth sea front, lots of sand..
Osktranot-
Hmm not really sure. I’d say ballast (bit of weight on the front) will probably be more important for grip. Never had to spec a cargo bike for gravel / sand ;-)
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I miss riding along the seafront from Bournemouth to Poole for work! I don't miss a constantly crunchy drivetrain though.
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Continental Cross Kings come in 29 x 2.0 and 20 x 2.0, I've found them pretty good for a mixture of surfaces, including Bournemouth seafront sand on occasions
MCamb
ltc
VeloSurMer
yeah, its low- you would x2 75kg if using the same tyre front and back (unless you were riding a unicycle.. )
Looking at tyre manufacturers specs the max load always goes down as the wheel / tyre gets smaller. bit counter productive as generally speaking the wheel itself gets inherently stronger and can handle heavier loads the smaller it gets.
Also anecdotally when I was working on repairing cargo bikes the sidewall failures would always happen on the larger tyres, which supposedly have a higher max load.
inquired with Conti and they said something about 'max load' also being influenced by wear rate, as in there are more revolutions to cover the same distance with smaller tyres, so if you exceed the max load then your tyre tread will have a shorter service life.
tl:dr- take the manufacturers spec with a grain of salt, choose reasonable quality tyres with strong sidewalls, keep your tyres pumped up and you'll be alright i reckon :)